评估肉的福利和行为受到生长速度和养殖密度的影响
Shengyu Zhou1, Pattarawan Watcharaanantapong1, Xiao Yang1
1Animal Science, The University of Tennessee, Knoxville, TN, USA.
Poultry science
|February 3, 2024
概括
减少肉生长率和养殖密度可以改善福利,但会延长生产时间并降低产能. 较慢的生长增强了活动和腿部健康,而较低的密度改善了骨强度和脚.
科学领域:
- 动物科学动物科学
- 家禽养殖家禽养殖家禽养殖家禽养殖
- 动物福利 动物福利
背景情况:
- 科布700肉被广泛用于肉类生产.
- 增长率 (GR) 和种群密度 (SD) 是影响 brojler 福利和绩效的关键管理因素.
- 了解GR和SD之间的相互作用对于优化生产和福利至关重要.
研究的目的:
- 评估不同增长率和种群密度对Cobb 700肉福利和行为的影响.
- 评估关键福利指标,如步态得分,骨强度,羽毛覆盖面和脚状况.
- 分析GR和SD对肉活动,养行为和整体生产绩效的影响.
主要方法:
- 通过控制料摄入,确定了三个增长率:标准 (> 60 g/d),中等 (50-60 g/d) 和较慢 (< 50 g/d).
- 肉在两个种群密度下养:30公斤/平方米和40公斤/平方米.
- 福利指标,活动指数和食者花费的时间在特定体重和整个生产周期内进行了测量.
主要成果:
- 增长较慢的肉较晚达到市场重量 (62天而不是标准的45天),并且料转换率较差 (1.80对1.57).
- 与标准和中等生长群体相比,生长缓慢的肉表现出更好的活动,羽毛覆盖和步态得分.
- 较低的种群密度 (30公斤/米2) 导致骨强度和脚状况比较好,而较高的种群密度 (40公斤/米2).
结论:
- 减少生长速度和养殖密度可以提高肉的福利,特别是腿部健康和羽毛状况.
- 这些福利改善的代价是大幅延长生产周期和降低生产绩效.
- 管理策略应平衡肉福利和经济生产效率之间的权衡.
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